Door-check



2 Sheets-Sheet 1. J. P. & J. H. SWIFT.

(No Model.)

DOOR GHBGK.

Patented Dec. 6, 1887.

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WITNETES 7 JW ATTORNEYS.

n. PETERS. PhnllrLilhngmpher. Washinglon. n. c.

(No Model.) v 2 SheetsShet 2.

J.'P. &J. H. SWIFT.

DOOR CHECK. N0. 374,563 Patented Dec. 6, 18-87.

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tlmrm STATES PATENT QFFICE.

JAMES P. SWIFT AND JAMES H. SWIFT, OF EVANSVILLE, INDIANA.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 374,563, dated December 6, 1887.

Application filed June 25, 1887. Serial Nil/242,481. (No model.)

To aZZ whom, it may concern.-

. given in the patent to James H. Swift, dated June 20, 1876, No. 178,976.

The object of our invention is to provide forthe ,ready adjustment of the curved lockingbar shownin said patent for variously-hinged doors, and to furnish asimple and convenient latch for working the check-bolt, together with an arrangement for operating said latch, looking the door, and sounding an alarm by the turning of the door-knob.

We will first describe a device of this character embodying our invention,and then point out the nature ofthe improvements in claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a View of door,showing a device embodying ourimprovements applied thereto, the knob-spindle being in section. Fig. 2 is an enlarged sectional plan of the curved locking-bar when rendered adjustable by our improvement. Fig. 3 is a front elevation of the said locking-bar. Fig. 4. is aperspective view of a check-bolt-operating latch and its tripping device in which our improvements are embodied.

A designates a door; B, a spring cheek-bolt; 0, its case secured to the top of the door and having a guide-slot for the curved locking-bar D, with holes in which the bolt B engages; E,

an angle-lever for retracting the spring-bolt B;

F, a bell-crank lever connected with the anglelever .E by a cord or wire, G H, a wire for drawing on the bell-crank lever F and retractingthe bolt, all as described in the before-mentioned patent to J. H. Swift.

The hinges of different doors may set out at various distances from the door-frame, and in order that the hinge pins may always be aligned with the center of the curve of the locking-bar D, we continue the free ends of the same to form straight parallel extensions D, which are adjustable lengthwise in fixed socks ets I in the door-frame.

We prefer to construct the sock els I by forming mortises I in the door-frame and securing over the mouths thereof plates J, each having a slot, J, to receiveclosely the corresponding locking-bar extension D and lugs J formed with perforations,through which and one of a series of holes D in said extension pins or bolts J are passed to hold the bar D firmly in position. The lugs on the plate J over the doorway are passedinto the mortise l,to allow the door to close fully; but the lugs on the other plate J may project on the outside, as shown, as the frame-molding will prevent the door. from swinging back to the wall. With this adj ustability of the lockingbar it may easily be so set that the bolt-ease on the door will not bind the bar in swinging.

For drawing down upon the cord or wire H, and thus retracting the bolt, we employ a latch of a description clearly illustrated in Fig. 4. This consists of a locking-plate, K, secured to the door A adjacent to, the knob and a springries of holes, K, in the plate K, so that on drawing down the arm L to retract the checkbolt it can readily be locked in such position, or as readily unlocked to allow the spring check-bolt to engage the loekingbar D. As a simple and convenient device for unlocking or tripping said latch by turning the door-knob, we provide an elastic metal angle-bar, M, having a squared slot, M,in its lower end to fit over the squared spindle of the knob,and pivoted to its upper end a toothed segment, N, provided with a central upwardly-projecting pin, 0.

The segment N is adapted to rock transversely on theface of the door, its teeth preventing it from slipping thereon, so that the latch-arm L,being drawndo'wn in front of the pin 0 on the rocking segment,on turning the knob in either direction the bar M will rock the segment, moving the pin 0 outward and withdrawing the pin or stud L on the latcharm from the locking-plate. As the spring cheek-bolt B is thus released,it engages the locking-bar D and securely locks the door.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is-- 1. In a door-check of the character de- 5 scribed, the combination, with a door-frame having fixed sockets I, of a curved lockingbar, D, having parallel end extensions,D', adjustable lengthwise in said sockets, and means for holding the bar D in its adjustment, sub- 10 stantially as shown and described.

2. In a doorcheck of the character described, the combination of fixed] plates J, provided with slots J and perforated lugs J a curved 1ocking-bar,D, having perforated ends I 5 received in the slots J ,and pins passed through the perforations in the lugs J 2 and in the ends of the bar D, substantially as shown and described. I

3. In a door-cheek, the combination of the spring-bolt B, the cord or wire H, for operating 20 the same, the handled pivotal spring-arm L, connected to said cord or wire and having a stud, L, and the locking -plate K, having a the segment, and the knob-spindle for operating the bar M, substantially as shown and described.

JAMES P. SWIFT. JAMES H. SWIFT. Witnesses:

GEORGE PALMER, EWALD BRAUNS. 

